;;; Compiled by f2cl version:
;;; ("$Id: f2cl1.l,v 1.209 2008/09/11 14:59:55 rtoy Exp $"
;;;  "$Id: f2cl2.l,v 1.37 2008/02/22 22:19:33 rtoy Rel $"
;;;  "$Id: f2cl3.l,v 1.6 2008/02/22 22:19:33 rtoy Rel $"
;;;  "$Id: f2cl4.l,v 1.7 2008/02/22 22:19:34 rtoy Rel $"
;;;  "$Id: f2cl5.l,v 1.197 2008/09/11 15:03:25 rtoy Exp $"
;;;  "$Id: f2cl6.l,v 1.48 2008/08/24 00:56:27 rtoy Exp $"
;;;  "$Id: macros.l,v 1.106 2008/09/15 15:27:36 rtoy Exp $")

;;; Using Lisp International Allegro CL Enterprise Edition 8.1 [64-bit Linux (x86-64)] (Oct 7, 2008 17:13)
;;;
;;; Options: ((:prune-labels nil) (:auto-save t)
;;;           (:relaxed-array-decls t) (:coerce-assigns :as-needed)
;;;           (:array-type ':array) (:array-slicing t)
;;;           (:declare-common nil) (:float-format double-float))

(in-package :clml.blas)


(defun drotg (da db c s)
  (declare (type (double-float) s c db da))
  (prog ((roe 0.0) (scale 0.0) (r 0.0) (z 0.0))
        (declare (type (double-float) z r scale roe))
        (setf roe db)
        (if (> (f2cl-lib:dabs da) (f2cl-lib:dabs db)) (setf roe da))
        (setf scale (+ (f2cl-lib:dabs da) (f2cl-lib:dabs db)))
        (if (/= scale 0.0) (go label10))
        (setf c 1.0)
        (setf s 0.0)
        (setf r 0.0)
        (setf z 0.0)
        (go label20)
   label10 (setf r
                 (* scale
                    (f2cl-lib:dsqrt (+ (expt (/ da scale) 2)
                                       (expt (/ db scale) 2)))))
        (setf r (* (f2cl-lib:dsign 1.0 roe) r))
        (setf c (/ da r))
        (setf s (/ db r))
        (setf z 1.0)
        (if (> (f2cl-lib:dabs da) (f2cl-lib:dabs db)) (setf z s))
        (if (and (>= (f2cl-lib:dabs db) (f2cl-lib:dabs da)) (/= c 0.0))
            (setf z (/ 1.0 c)))
   label20 (setf da r)
        (setf db z)
        (go end_label)
   end_label (return (values da db c s))))

(in-package #-gcl #:cl-user #+gcl "CL-USER")
#+#.(cl:if (cl:find-package '#:f2cl) '(and) '(or))
(eval-when (:load-toplevel :compile-toplevel :execute)
  (setf (gethash 'fortran-to-lisp::drotg
                 fortran-to-lisp::*f2cl-function-info*)
        (fortran-to-lisp::make-f2cl-finfo :arg-types '((double-float)
                                                       (double-float)
                                                       (double-float)
                                                       (double-float))
          :return-values '(fortran-to-lisp::da fortran-to-lisp::db
                           fortran-to-lisp::c fortran-to-lisp::s)
          :calls 'nil)))

